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3 years ago

Analyze the role coefficients in a chemical reaction play in stoichiometry

Chemistry

1 answer:

kumpel [21]3 years ago

7 0

Answer:

This is known as the coefficient factor

Explanation:The balanced equation makes it possible to convert information about one reactant or product to quantitative data about another element.

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Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constan

barxatty [35]

Answer:

The law that states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constant is Avogadro's law.

Explanation:

Pressure, temperature, volume, and amount of gases are related.

There are four basic gas laws: Boyle's law, Charles' law, Gay-Lussac's law and Avogadro's law.

The combination of the first three above mentioned laws gives rise to the combined law of gases. When Avogadro's law is incorporated, ideal gas equation is obtained.

These are the laws:

1) Boyle's law: at constant temperature, the pressure are volume of the a fiexed amount of gases are inversely related:

PV = constant

P₁V₁ = P₂V₂

2) Charle's law: at constant pressure, the volume and temperarure of a fixed amount of gases are directly (proportionaly) related:

P/T = constant

P₁ / T₁ = P₂ / T₂

3) Gay-Lussac's law: if the volume of a fixed amount of gas is kept constante, the pressure and temperature are directly related:

P / T = constant

P₁ / T₁ = P₂ / T₂

4) Combined law: shows the relation between pressure, volume, and temperature for a fixed amount of gas:

PV / T = constant

P₁V₁ / T₁ = P₂V₂ / T₂

In all previous law the numerical value of the temperature must be expressed in absolute scale: kelvin.

5) Avogadro's law: equal volume of gases at the same temperature and pressure contain the same number of particles (atoms or molecules).

Using n for the number of moles of gas particles:

V/n = constant

V₁ / n₁ = V₂ / T₂

1 mol of gas at T = 0°C (273.15 K) and P = 1 atm occupies aproximately 22.4 liter.

6) Ideal gas law:

PV / nT = constant

R = Universal constant of gases

PV / nT = R

PV = nRT

T expressed in absolute scale (Kelvin)

3 0

4 years ago

A 1.525g sample of a compound between nitrogen and hydrogen contains 1.333 g of nitrogen. Calculate its empirical formula. The e

vredina [299]

Answer:

NH2.

Explanation:

The mass of hydrogen in the sample = 1.525 - 1.333 = 0.192g.

Dividing the 2 masses by the relative atomic mass of hydrogen and nitrogen:

H: 0.192 / 1.008 = 0.1905

N: 1.333 / 14.007 = 0.09517

The ratio of N to H = 0.09517 : 0.1905

= 1 : 2.

So the empirical formula is NH2.

5 0

3 years ago

0.25 mole of mg contains how many atoms

Alchen [17]

Hey there!

One mole is 6.022 x 10²³ atoms.

We have 0.25 moles.

0.25 x 6.022 x 10²³ = 1.5055 x 10²³

0.25 moles of magnesium contains 1.5055 x 10²³ atoms.

Hope this helps!

4 0

3 years ago

Convert 1.35 × 1024 atoms of carbon to moles of carbon.

Law Incorporation [45]

6.022 × 10^23 × 1.45 × 10^24 = 8.7319 × 10^47

6 0

3 years ago

What class of elements includes all of the elements that are gases at room temperature? nonmetals metals metalloids?

Novay_Z [31]

Metals have high density. They are always solids at room temperature.
Metalloids have intermediate density. They are generally solids at room temperature.
Non-metals have low density. They can be solids, liquids or gases at room temperature.

Based on this, the class of elements that includes all of the elements that are gases at room temperature is the non-metals

6 0

3 years ago

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